doc/lispintro/cons-5.txt


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     kill-ring     kill-ring-yank-pointer
         |               |
         |      ___ ___  |     ___ ___      ___ ___
          ---> |   |   |  --> |   |   |    |   |   |
               |___|___|----> |___|___|--> |___|___|--> nil
                 |              |            |
                 |              |            |
                 |              |             --> "yet more text"
                 |              |
                 |               --> "a different piece of text"
                 |
                  --> "some text"